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Mirrors > Home > MPE Home > Th. List > 0wlkon | Structured version Visualization version GIF version |
Description: A walk of length 0 from a vertex to itself. (Contributed by Alexander van der Vekens, 2-Dec-2017.) (Revised by AV, 3-Jan-2021.) (Revised by AV, 23-Mar-2021.) (Proof shortened by AV, 30-Oct-2021.) |
Ref | Expression |
---|---|
0wlk.v | ⊢ 𝑉 = (Vtx‘𝐺) |
Ref | Expression |
---|---|
0wlkon | ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(𝑁(WalksOn‘𝐺)𝑁)𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 482 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → 𝑃:(0...0)⟶𝑉) | |
2 | 0wlk.v | . . . . 5 ⊢ 𝑉 = (Vtx‘𝐺) | |
3 | 2 | 0wlkonlem1 28383 | . . . 4 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)) |
4 | 2 | 1vgrex 27275 | . . . . 5 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
5 | 4 | adantr 480 | . . . 4 ⊢ ((𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉) → 𝐺 ∈ V) |
6 | 2 | 0wlk 28381 | . . . 4 ⊢ (𝐺 ∈ V → (∅(Walks‘𝐺)𝑃 ↔ 𝑃:(0...0)⟶𝑉)) |
7 | 3, 5, 6 | 3syl 18 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (∅(Walks‘𝐺)𝑃 ↔ 𝑃:(0...0)⟶𝑉)) |
8 | 1, 7 | mpbird 256 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(Walks‘𝐺)𝑃) |
9 | simpr 484 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑃‘0) = 𝑁) | |
10 | hash0 14010 | . . . 4 ⊢ (♯‘∅) = 0 | |
11 | 10 | fveq2i 6759 | . . 3 ⊢ (𝑃‘(♯‘∅)) = (𝑃‘0) |
12 | 11, 9 | syl5eq 2791 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (𝑃‘(♯‘∅)) = 𝑁) |
13 | 0ex 5226 | . . . 4 ⊢ ∅ ∈ V | |
14 | 13 | a1i 11 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅ ∈ V) |
15 | 2 | 0wlkonlem2 28384 | . . 3 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → 𝑃 ∈ (𝑉 ↑pm (0...0))) |
16 | 2 | iswlkon 27927 | . . 3 ⊢ (((𝑁 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉) ∧ (∅ ∈ V ∧ 𝑃 ∈ (𝑉 ↑pm (0...0)))) → (∅(𝑁(WalksOn‘𝐺)𝑁)𝑃 ↔ (∅(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = 𝑁 ∧ (𝑃‘(♯‘∅)) = 𝑁))) |
17 | 3, 14, 15, 16 | syl12anc 833 | . 2 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → (∅(𝑁(WalksOn‘𝐺)𝑁)𝑃 ↔ (∅(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = 𝑁 ∧ (𝑃‘(♯‘∅)) = 𝑁))) |
18 | 8, 9, 12, 17 | mpbir3and 1340 | 1 ⊢ ((𝑃:(0...0)⟶𝑉 ∧ (𝑃‘0) = 𝑁) → ∅(𝑁(WalksOn‘𝐺)𝑁)𝑃) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ∅c0 4253 class class class wbr 5070 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ↑pm cpm 8574 0cc0 10802 ...cfz 13168 ♯chash 13972 Vtxcvtx 27269 Walkscwlks 27866 WalksOncwlkson 27867 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-ifp 1060 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-n0 12164 df-z 12250 df-uz 12512 df-fz 13169 df-fzo 13312 df-hash 13973 df-word 14146 df-wlks 27869 df-wlkson 27870 |
This theorem is referenced by: 0wlkons1 28386 0trlon 28389 |
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